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"""NumPy implementation of Beam Search. Can be used for decoding in Seq2Seq | |
models or transformer. | |
See https://chao-ji.github.io/jekyll/update/2019/01/24/Beam_Search.html | |
for an in-depth disucssion. | |
""" | |
import numpy as np | |
NEG_INF = -1e9 |